Unicorn Chronicles Book II: Song of the Wanderer by Bruce Coville (Aug 1 2008)

HARDCOVER EDITION. Cara must return to Earth to save her grandmother, the Wanderer, but she must first travel through the wilderness of Luster, land of the unicorns, full of unknown creatures and perilous adventure. Only at the back of the dragon Ebillan's cave will she find the gate that can bring her back to Earth. As Cara embarks on the journey of her life, there is one who still stands in her way: Beloved, Cara's infamous ancestor, who has dedicated a lifetime to ridding the earth of unicorns. Is Cara strong enough to resist Beloved's ruthless magic? Can she bear betraying her own ...